Bump Amazon.Lambda.APIGatewayEvents from 2.7.2 to 2.7.3

---
updated-dependencies:
- dependency-name: Amazon.Lambda.APIGatewayEvents
  dependency-version: 2.7.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

test/SimpleAPI.Tests/SimpleAPI.Tests.csproj

@@ -18,7 +18,7 @@
   <ItemGroup>
     <PackageReference Include="Amazon.Lambda.Core" Version="2.8.0" />
     <PackageReference Include="Amazon.Lambda.TestUtilities" Version="3.0.1" />
-    <PackageReference Include="Amazon.Lambda.APIGatewayEvents" Version="2.7.2" />
+    <PackageReference Include="Amazon.Lambda.APIGatewayEvents" Version="2.7.3" />
     <PackageReference Include="AWSSDK.Extensions.NETCore.Setup" Version="4.0.3.17" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
     <PackageReference Include="xunit" Version="2.9.3" />